• Welcome to STK

    Founded in 1987, STK has attained 124 patents during the production of crushers & mills over the past 30 years. 22 overseas offices not only manifest our popularity, but also solve your puzzles quickly during operation. So if you are looking for crushers or mills, STK deserves your attention!

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  • 600,000 m2 of Production Bases

    By 2016, STK has built 6 world-class manufacture bases, which cover a total area of over 600,000m2, and accomplished an annual production value of RMB 5 billion.

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Control of Noise in Quarries - HSE

Crusher control room ... defined as the 'daily personal noise exposure'; it is measured in dB(A) and takes ..... The use of 'stone' baffles and/or chute linings.

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Stone crushing plant set up temporarily for the purpose of…

This environmental guideline for stone crushing plant set up temporarily for the purpose of ... issues associated with a temporary Stone Crushing Plant are noise and ... A tonal character adjustment of +5 dB(A) should be applied to the measured ... measures such as enclosure of plant and equipment shall be taken to control.

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Snapshot of Noise and Worker Exposures in ... - Semantic…

engines) where sound levels greater than 90 dB(A) are pres ent. ... no reduction in noise exposure being allowed due ... coal mines, coal preparation plants, stone (aggregate) ... operators, crusher operator, dredge/crane operators, boat.

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Assessing and Mitigating Noise Impacts - New York State…

Feb 2, 2001 ... plastics, stone or metal; grinders; screens; conveyers; storage bins; or electrical equipment .... placed in final permits to ensure effective noise control. When it is ..... crusher. 89 dB(A) at 100 ft. 69.0 dB(A). 63.0 dB(A). 59.5 dB(A).

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Comprehensive Control of the Noise Occupational…

of noise source, and high level of noise pressure. Table 1. Noise level in main workplaces. Workplace. Test numbers. The highest noise level/dB(A). Crusher...

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A study on noise pollution of stone crusher…

A study on noise pollution of stone crusher machine at Jaflong, Sylhet. SZ Farzana1, AH ... 70 dB. 75 dB. Each type of pollution has a more or less bad impact on human life. ... any special arrangement for reduction of noise level. 43% hospitals...

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5 NOISE SOURCES

operations and equipment including crushing, riveting, blasting (quarries and .... provide a possible sound power reduction of up to 6 dB assuming that the other...

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ROCK CRUSHING NOISE REDUCTION CUSTOMER CASE ...

Oct 22, 2016 ... You can communicate with online customer service,or ... stone crusher noise reduction db ...mobile jaw crusher with dust reduction system...

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Ear Plugs Noise Reduction - Cooper Safety Supply

Classified by their potential to reduce noise in decibels (dB), a term used to categorize the power or density of sound, hearing protectors must be tested and...

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Noise Levels of Sand and Stone Quarry at Kota Belud…

Jul 23, 2017 ... sand and stone industry causing the increase of noise pollution ... release, removing or placing the waste to be harmful to health, safety, public ... hearing threshold is increased to 10 dB and above in 2000, 3000, and ... Stone quarry site have highest level of noise due to crushing stone activities where the.

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Noise Assessment of Stone/Aggregate Mines: Six…

s u r v e ~ h g stone (aggregate) &ing and crushing and. (WOSH, 1996),% ... of cabs in reducing mobile equipment operator noise exex- pornre i~ dhcussed.

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effectiveness of environmental pollution control…

MEASURES IMPLEMENTED IN STONE CRUSHING SITES LOCATED AT. KADUWELA ... control measures, results revealed a substantial reduction of noise level and very slight .... The maximum permissible level is 55 dB during day time.

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Analysis of Possible Noise Reduction Arrangements…

Oct 16, 2017 ... Keywords: olive oil mills; noise pollution; noise reduction; workers' health and safety ... olive oil mills, stone wheels (roller crusher) crush the olives and the ... 90 dB(A), with an exchange rate of 5 dB(A) where an increase of 5...

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Noise Pollution in Stone Quarrying Industry –A…

Noise pollution, Stone quarry, Health hazards, Control measures. ... The highest noise level recorded during crushing activity is 97.8 dB (A) at 0 distance and the...

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